"Physically," Zadkiel said. "I guess you could call it a catch. I can heal people, but whatever pain I take from them becomes my own. It's too a lesser degree, and generally after a few hours or a good night's sleep it fades away, but I have to be careful what I do and how much I do, because I have to be able to endure it."
He finally sits down, cross-legged on the bed next to Ganesh, leaning against the wall at the head of the bed so he can face the other man. "I wasn't always like this. Or I didn't know. It started when I was eleven or twelve. You know how little children, when they get hurt, they want someone to kiss it and make it better? I realized after a few times that I actually did make it better. It was subtle enough, thankfully, that no one ever seemed to notice. But I was very popular when it came to bumps and bruises." He smiled again, although it faded after a moment.
He didn't bring up the other catch. There was no reason for anyone to ever know about that.